Awesome, and so much more.
I don't know why people like Benkei so much better then **** I gave Yoshitsune all the weapons (crafted 75 Paralysing Lightning Swords) gave him all the essences of Agamhande (reached level 18 attack power) got him somewhere around 250 attack, coupled with a Hi-Power Potion (Another some odd high) I pulled 325 attack, took really really nasty dents out of the last bosses health with quick strikes.
Only downside is the lack of control while in Kamui mode, the square button can sometimes be grey because an enemy attacked too soon, or they flanked you from the side, and also it didn't seem like slow-mo at all, just a "now you can counter with some reasonable timing" otherwise I've discovered you can indeed counter in .4 seconds from being hit.
Enemies I managed to counter-attack BIG ARMOR, Spear guy, ONE sword guy (hard as hell to counter!!!) several Hammer pants wearing guys (the one with dual fist weapons). Definetly master-able but lack of control makes for fun.
I'd suggest if you like more flash flash, and control plus some greek mythology, combined with some sweet ass upgrades and deadly as well as F'ing awesome, combos. I suggest God of War for it's new price of $20
Otherwise just rent or buy Genji for 20 dollars or less, it'll still be worth the money :) believe me.